Amber spotted ZD #1000719 who got these iframe error messages in the form:
when trying to donate via:
I am unable to replicate this, but it's odd-enough looking that I thought worth Phabifying. There is nothing recent at the Adyen console for this donor, who is in Civi from past contrib at cid=6887882.
Fr-Tech, please let me know if there's anything we can ask affected donors beyond the usual browser / OS / add-ons details.